1 /*
2 * Copyright (C) 2017 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16 #define LOG_TAG "schedulerservicehidl"
17
18 #include "SchedulingPolicyService.h"
19
20 #include <private/android_filesystem_config.h> // for AID_CAMERASERVER
21
22 #include <log/log.h>
23 #include <hwbinder/IPCThreadState.h>
24 #include <mediautils/SchedulingPolicyService.h>
25
26 namespace android {
27 namespace frameworks {
28 namespace schedulerservice {
29 namespace V1_0 {
30 namespace implementation {
31
isAllowed()32 bool SchedulingPolicyService::isAllowed() {
33 using ::android::hardware::IPCThreadState;
34
35 return IPCThreadState::self()->getCallingUid() == AID_CAMERASERVER;
36 }
37
requestPriority(int32_t pid,int32_t tid,int32_t priority)38 Return<bool> SchedulingPolicyService::requestPriority(int32_t pid, int32_t tid, int32_t priority) {
39 if (priority < static_cast<int32_t>(Priority::MIN) ||
40 priority > static_cast<int32_t>(Priority::MAX)) {
41 return false;
42 }
43
44 if (!isAllowed()) {
45 return false;
46 }
47
48 // TODO(b/37226359): decouple from and remove AIDL service
49 // this should always be allowed since we are in system_server.
50 int value = ::android::requestPriority(pid, tid, priority, false /* isForApp */);
51 return value == 0 /* success */;
52 }
53
getMaxAllowedPriority()54 Return<int32_t> SchedulingPolicyService::getMaxAllowedPriority() {
55 if (!isAllowed()) {
56 return 0;
57 }
58
59 // TODO(b/37226359): decouple from and remove AIDL service
60 return 3;
61 }
62
63 } // namespace implementation
64 } // namespace V1_0
65 } // namespace schedulerservice
66 } // namespace frameworks
67 } // namespace android
68